Philemon 1:8

Wherefore, though I might be much bold in Christ to enjoin thee that which is convenient,

The line belongs to Paul's letter to Philemon, which belongs to the time of his imprisonment and work in Rome. It addresses the relationship between master and servant within the Roman system of slavery. Under that system, masters could inflict severe and arbitrary punishment on slaves. The gospel's influence on that master-servant relationship challenged the system's degrading treatment of slaves.